**DIRAC
.TITLE
 BeH,ffpt RelCC
.WAVE F
.4INDEX
**HAMILTONIAN
.X2C
.OPERATOR
 ZDIPLEN
 COMFACTOR
 zff
**INTEGRALS
*READINP
.UNCONTRACT
**WAVE FUNCTIONS
.SCF
.RELCCSD
*SCF
.CLOSED SHELL
4 
.OPEN SHELL
1
1/2 
.EVCCNV
1.0D-9  5.0D-7
# reads starting (unperturbed) MOs, DFPCMO
.MAXITR
8
**MOLTRA
# all 5 electrons,all virtuals 
.ACTIVE
all
**RELCC
.ENERGY
.PRINT
1
# all electrons active
.NELEC
3 2   
*CCENER
.MAXIT # maximum number of iterations for (0,0) sector
60
.NTOL
10
*END OF